@article {9809,
	title = {Benthic food web structure of a highly stratified sub-Arctic archipelago on the Newfoundland Shelf (Northwest Atlantic Ocean)},
	journal = {Estuarine, Coastal and Shelf Science},
	year = {2024},
	month = {Jan-10-2024},
	pages = {108982},
	abstract = {Arctic and sub-Arctic marine ecosystems are experiencing some of the highest sea surface warming in the world, which has intensified water column stratification and subsequently reduced phytoplankton production and particulate organic matter quality. However, the effects of these changes on benthic food webs and the transfer of organic matter to higher trophic levels are still poorly understood. This study examines the spatial and temporal variability of food web structure in a sub-Arctic benthic community exposed to contrasting thermal stratification conditions. The study hypothesizes that during stratified periods, oceanographic conditions would have a limited effect on benthic invertebrates located above/at the thermocline due to their direct access to surface/subsurface primary production. On the other hand, organisms below the thermocline may be more sensitive to increased stratification because they do not have direct access to these food resources. To test this hypothesis, we sampled benthic invertebrates and several fish species on the Newfoundland Shelf along a cross-shore transect (2 shallow stations versus 2 deep stations above and below the thermocline, respectively) over two seasons. We used isotopic analyses (δ13C and δ15N) to study the structure of the food web and the transfer of organic matter. No temporal variation and little spatial variability in food web structure was observed, resulting in a 73.2\% overlap between isotopic niches of shallow and deep stations. At all stations, most primary consumers were characterized by high trophic plasticity, feeding on both phytoplankton and benthic organic matter (mean dependence on benthic sources = 46.7\%). In the context of global warming and increased thermal stratification, we hypothesize that benthic primary production may be less vulnerable to nutrient depletion than phytoplankton. We suggest that an increased contribution of benthic primary producers to organic matter fluxes in shallow coastal food webs could significantly enhance the resilience of the benthic food web to stratification intensification.},
	keywords = {benthic ecosystems, Climate Change, Food web structure, Seasonal stratification, Stable isotopes, Sub-Arctic ecosystems},
	issn = {02727714},
	doi = {10.1016/j.ecss.2024.108982},
	url = {https://www.sciencedirect.com/science/article/pii/S0272771424003706},
	author = {Bridier, Guillaume and Fr{\'e}d{\'e}ric Olivier and Chauvaud, Laurent and Le Garrec, Vincent and Droual, Gabin and Grall, Jacques}
}
@article {9717,
	title = {Diversity and spatial variability of shallow benthic macrofaunal assemblages in a high-Arctic fjord (Young Sound, North-East Greenland)},
	journal = {Polar Biology},
	volume = {47},
	year = {2024},
	month = {Jan-04-2024},
	pages = {333 - 348},
	abstract = {Although knowledge of Arctic benthic biodiversity has increased considerably in recent decades, some regions, such asNortheast Greenland, remain poorly studied. The aim of this study was to complement a previous macrofaunal inventorycarried out in Young Sound, a High-Arctic fjord in this region (74{\textdegree}N). We sampled shallow benthic assemblages along asmall inner/outer fjord gradient, including one station previously prospected two decades ago and three new stations. Thissampling strategy revealed highly diversified benthic assemblages (166 species identified on a total sampling area of 1.32m2), which considerably increases the number of species recorded for the fjord (i.e. 225 species vs 100 previously recorded).The outermost station was dominated in abundance by various assemblages of bivalves, while the middle stations showedgreater species evenness, including numerous species of polychaetes, bivalves and crustaceans. The innermost station wasdominated by ostracods, gammarid amphipods and tube-dwelling polychaetes. Overall, benthic assemblages varied little between the four stations and the transect as a whole exhibited characteristics typical of outer fjord habitats, reflecting the rather moderate impact of meltwater inputs in this part of the fjord. Finally, trophic plasticity and omnivory were observed in most of the recorded macrobenthic species, highlighting the adaptability of these species to low trophic availability in the ecosystem. Future biodiversity studies will need to explore the innermost and deepest areas to provide a more comprehensive inventory and understanding of the influence of environmental conditions on the structure and functioning of Young Sound benthic habitats.},
	keywords = {Arctic fjord, benthic ecosystems, community structure, Macrofauna, meltwater inputs},
	issn = {0722-4060},
	doi = {10.1007/s00300-024-03235-y},
	url = {https://link.springer.com/article/10.1007/s00300-024-03235-y},
	author = {Bridier, Guillaume and Fr{\'e}d{\'e}ric Olivier and Pinsivy, Lucas and Jourde, J{\'e}r{\^o}me and Chauvaud, Laurent and Sejr, Mikael K. and Burel, Thomas and Le Duff, Michel and Grall, Jacques}
}
@proceedings {6079,
	title = {Ecoregionalisation and conservation of benthic communities in the French exclusive economic zone of Kerguelen},
	volume = {1},
	year = {2019},
	month = {11/06/2019},
	pages = {pp 413},
	publisher = {Australian Antarctic Division},
	edition = {Australian Antarctic Division, Kingston, Tasmania, Australia},
	address = {Kingston, Tasmania, Australia},
	abstract = {<p>The deep-sea benthic ecosystems of the French Kerguelen exclusive economic zone remain poorly understood. To address benthic conservation issues, the authors recently contributed expert knowledge to guide the recent extension of the Marine Reserve of the {\textquoteleft}Terres australes fran{\c c}aises{\textquoteright}. In this new study, we propose a benthic ecoregionalisation of the northern Kerguelen Plateau based on a measurable and repeatable methodology that relies on the generalised dissimilarity modelling technique. Data of macro-epibenthic invertebrate species from the POKER 2 (2010) fish stock assessment survey have been used to compute the models. Our results allow us (i) to characterise and map benthic landscape units based on assemblages of marine invertebrates pooled by taxa and life-history traits, (ii) to highlight the environmental drivers of the spatial distribution of benthic assemblages, (iii) to assess the relevance of the CCAMLR{\textquoteright}s vulnerable marine ecosystems bioindicator taxa, and (iv) to assess the effectiveness of {\textquoteleft}strictly protected areas{\textquoteright} of the new Marine Reserve for the conservation of deep-sea benthic ecosystems.</p>
},
	keywords = {benthic ecosystems, benthos, deep-sea, ecoregionalisation, kerguelen, poker},
	url = {http://heardisland.antarctica.gov.au/__data/assets/pdf_file/0009/229158/34-Martin-FullMS.pdf},
	author = {Martin, Alexis},
	editor = {Trouslard, Emmanuelle and Hautecoeur, M{\'e}lyne and Blettery, Jonathan and Moreau, Camille and Sauc{\`e}de, Thomas and Ameziane, Nadia and Guy Duhamel and Eleaume, Marc}
}
